#include <fstream>
#include <cstring>
using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

char a[2000005], b[2000005];
int i, j, n, q, l1, l2;
int cach[2000001], sol[1024];

int main()
{
    f.getline(a, sizeof(a));
    l1 = strlen(a);

    f.getline(b, sizeof(b));
    l2 = strlen(b);

    for (i = l1; i >= 1; i--)
        a[i] = a[i-1];

    for (i = l2; i >= 1; i--)
        b[i] = b[i-1];

    a[0] = b[0] = ' ';

    for (i = 2; i <= l1; i++)
    {
        while (q && a[q+1] != a[i])
            q = cach[q];
        if (a[q+1] == a[i])
            q++;
        cach[i] = q;
    }

    q = 0, cach[1] = 0;
    for (i = 1; i <= l2; i++)
    {
        while (q && a[q+1] != b[i])
            q = cach[q];
        if (a[q+1] == b[i])
            q++;
        if (q == l1)
        {
            q = cach[q];
            n++;
            if (n <= 10*10*10) sol[n] = i-l1;
        }
    }
    g << n << "\n";
    for (i = 1; i <= min(n, 1000); i++)
        g << sol[i] << " ";
    return 0;
}